51624701 has 2 divisors, whose sum is σ = 51624702. Its totient is φ = 51624700.

The previous prime is 51624697. The next prime is 51624707. The reversal of 51624701 is 10742615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 25512601 = 5110^2 + 5051^2 .

It is a cyclic number.

It is not a de Polignac number, because 51624701 - 2² = 51624697 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51624707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25812350 + 25812351.

It is an arithmetic number, because the mean of its divisors is an integer number (25812351).

Almost surely, 2^51624701 is an apocalyptic number.

It is an amenable number.

51624701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51624701 is an equidigital number, since it uses as much as digits as its factorization.

51624701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51624701 is about 7185.0331244887. The cubic root of 51624701 is about 372.3509930577.

It can be divided in two parts, 51624 and 701, that added together give a palindrome (52325).

The spelling of 51624701 in words is "fifty-one million, six hundred twenty-four thousand, seven hundred one".